[Python-modules-team] Bug#433038: Debian bug#433038: mod_python collides with mod_php5

[Robert Edmonds]

Hi, Graham:

Thanks for the fast follow-up.  I'm adding the bug report to the To: so
that the original bug submitter will see your response.

Graham Dumpleton wrote:
> In 411487 it mentions:
> 
> """So, it seems it's directly related to libmhash2 (as [2] suggests)."""
> 
> Disabling of mhash module may not be enough if one of the other PHP
> modules they list in 433038 also use libmhash2 library. Quite possible
> that one of the crypto libraries use it, or the ldap module mentioned
> in the mod_python mailing list mail.
> 
> Can you run ldd on main PHP module and all PHP modules and see which
> one has a dependency on libmhash2, or any other md5 hash library.
> 
> Basic problem as we understand it is that libmhash2 uses a symbol name
> which clashes with one used by Python md5 module. Which ever gets
> loaded first, usually PHP version, takes precedence and since that is
> not compatible with other package a crash occurs.
> 
> If it can be determined that it is libmhash2 and then which symbol in
> it clashes with one in Python md5 module, one or the other could
> somehow be namespace escaped to avoid the problem.
> 
> Graham
> 
> On 31/08/2007, Robert Edmonds <edmonds at debian.org> wrote:
> > Hi,
> >
> > I'm one of the Debian maintainers of the libapache2-mod-python package.
> > Could someone please take a look at the report filed here?
> >
> >     http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=433038
> >
> > The user writes,
> >
> >     If libapache2-mod-python is installed together with libapache2-mod-php5,
> >     (at least) the mod_python.psp handler fails immediately without any proper
> >     error message.
> >
> >     This also happens if the php5 mhash module is uninstalled, purged and
> >     apache is restarted.  mod_python starts working immediately if mod-php5 is
> >     disabled using "a2dismod php5" and restarting apache.
> >
> >     [...]
> >
> >     This effectively renders mod_python.psp unusuable as soon as mod-php5
> >     (maybe together with some specific modules) is installed and it's also hard
> >     to debug as there's no indication whatsoever of what is going wrong, other
> >     than that it "doesn't work".
> >
> > More details are on the page.  I'm afraid I'm having difficulties
> > tracking down the root cause of the user's problem.
> >
> > --
> > Robert Edmonds
> > edmonds at debian.org
> >
> >
> 

-- 
Robert Edmonds
edmonds at debian.org